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In the precision instrument debugging room of the National Precision Tools Engineering Research Center, the staff clicked the button, and the car gear fixed on a detection platform quickly turned up. On the computer screen next to it, the number jumped rapidly. In just over 10 seconds, the measurement results are displayed, along with the measured value and the allowable deviation value, which makes it clear at a glance. Qi Gang, the deputy chief engineer of the research center, commented on this self-developed rapid detection sorting machine: “Because of the fast detection speed, high degree of automation, and low price, it can meet the rapid detection of 100% of the gears of automobile manufacturers. It guarantees the quality and safety of the national automobile. This equipment fills the gap in the field of online detection and sorting technology of domestic automobile gears."
"Image analogy, CNC tools are the teeth of CNC machine tools, precision measuring instruments are the eyes of CNC machine tools. They promote each other, closely related, equipment, services, and promote the development of CNC manufacturing equipment, especially digital cutting technology." Chengdu Tools Research Xie Huaxuan, a senior engineer and doctoral tutor, made an analogy.
Relevant statistics show that after decades of construction and development, China's measuring equipment industry has initially formed an industrial system with relatively complete product categories, a certain scale of production and development capabilities, and has become the second largest producer in the world except Japan. However, as the basis of CNC cutting technology, China's tool manufacturing industry still has a big gap with the advanced level in foreign countries in terms of the technical level and performance quality of measuring instruments.
The country's output has a constant bright spot
From visual inspection to simple measurement to precision measurement, advances in measurement technology have guaranteed the advancement of manufacturing technology to a certain extent. The famous scientist Mr. Qian Xuesen also pointed out: "Information technology includes measurement technology, computer technology and communication technology. Measurement technology is the key and foundation."
The person in charge of the China Machine Tool Industry Association told the reporter that precision machining not only requires the accuracy and stability of the machine tool, but also the accuracy of the tool and fixture to ensure that the precision measuring instrument also needs to be calibrated and measured. “There are some processes (such as tool setting instruments); some are after-the-fact inspections (such as gear measuring instruments).â€
According to industry experts, taking the wind power industry as an example, the processing and testing of some typical key components such as steam turbine blades, rotor wheel slots and turbine generator rotor weaving grooves in power generation equipment represent and reflect to some extent. A country's advanced cutting technology and the latest achievements and levels of CNC cutting tools, digital measuring technology and measuring instruments have attracted the attention of the tool manufacturing industry.
It is gratifying to note that domestic measuring instruments manufacturers have increased their investment in the independent development of digital display technology and digital display products in recent years, and have achieved great results. Domestic digital display gauges have evolved from simple strip LCD digital display in previous years to more complex surface LCD dynamic simulation image display. The resolution of digital caliper capacitor grid has been improved from 0.01 mm to 0.001 mm. Measurement accuracy and reliability. There has been a significant improvement. The ever-increasing waterproof and dustproof performance (from IP54 to IP65, which can now reach IP67) has also enhanced the market competitiveness of domestic digital display gauges.
Harbin Measuring and Cutting Tool Group Co., Ltd. (hereinafter referred to as Haliang) has continuously strengthened its advantages in the development and manufacturing of precision instruments such as gear measuring instruments, surface roughness measuring instruments and profile measuring instruments for nearly 10 years, and successfully developed the largest domestically produced 2 meters. CNC gear measuring instrument has become the most competitive manufacturer of precision measuring instruments in China.
Luo Defu, director of the National Precision Tools Engineering Research Center and director of the Chengdu Tool Research Institute, said that the center's achievements in new tool materials, surface modification processes for tool materials, and gear gauges have been at the leading level in China. Through unremitting efforts, we now have the most advanced precision tool production equipment with independent intellectual property rights in China, and established an industrialization base, which has enabled China's precision tools to achieve leap-forward development in terms of R&D, process equipment and industrialization capabilities. The results are close to or reach the world's advanced level.
"Double-frequency laser interferometer" is the core product developed by the center independently. Now only the center in China has this technology to produce this equipment. Its successful development has changed China's long-term dependence on imports in this field. He just proudly said: "The multiple functions of the instrument have broken the technical blockade of foreign countries, the detection resolution reaches 0.02 microns, and the detection length can reach 20 meters. The price is much lower than that of similar foreign products. In the international, this instrument can be Compete with similar products in countries such as the United Kingdom and the United States!"
Three major areas still need to work hard
Despite significant progress in many areas, the industry believes that the status quo of China's precision measurement technology and instruments is still far from meeting the rapid development of domestic machinery and equipment manufacturing, especially in the basic theory of advanced measurement technology and instruments. The gap between the development of research and common key technologies and foreign countries is growing.
Xie Huaxuan believes that compared with cutting tools, the gap between China and foreign countries is larger in terms of measuring instruments, mainly reflected in the following three technical fields:
First, the measurement technology and instrumentation of CNC machine tools, especially the high-precision dynamic and static CNC machine tools represented by laser measurement systems, and the accuracy and performance testing techniques and precision compensation technology. The high-performance laser measuring system is mainly used for the precision detection and evaluation of high-end numerical control equipment such as CNC machine tools and coordinate measuring machines. China's domestic laser interferometry system, which is mainly developed and produced by Chengdu Tool Research Institute, has a certain gap compared with foreign advanced level.
The second is the CNC tool measurement technology and instrument, especially the high-precision CNC numerical control tool measurement technology, CNC tool on-machine measurement technology and CNC tool pre-adjustment measurement technology and instrument. Taking the series of high-precision and fully automatic tool pre-adjustment measuring instruments as an example, China's development started relatively late. In 2005, at the Beijing Machine Tool Exhibition, Haliang and Tianjin Tianmen debuted to show the use of digital knives with area array CCD. Pre-adjust the measuring instrument prototype. In addition, Tianjin Tianmen, Chengquan, etc. are all under development, but there is still a certain gap in technical level and quality.
The third is the on-machine/online digital measurement technology and instrument suitable for the production site, especially the on-machine measurement and feedback correction compensation technology and device for complex precision contour machining, such as CNC forming gear grinding machine measurement technology and device, steam turbine blade site. Online measurement technology and devices.
Some experts in the industry have pointed out that in the past, the division of professional research institutes in the machinery industry into enterprises has led to a reduction in investment in technology development and the loss of technical backbone personnel, which has adversely affected the development of precision measuring instrument manufacturing. In this regard, Xie Huaxuan believes that relevant state departments should take measures as soon as possible, through policy inclination, increase investment in the “National Precision Tools Engineering Technology Development Centerâ€, selectively, appropriately restore or form a limited number of non-profit, countries. The funded professional research institutes focus on high-tech research on the development of the national economy and national defense industry, and guide and promote the improvement of the technical level of the industry.
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China's precision measuring instruments urgently need to shorten the gap with the international
Measuring instrument is very important